Industry's-First Completely Integrated CCFL Inverter Controller with Wide Dimming Range, High Performance, and Complete Fault Protection Features
| Status |
| Active: In Production. |
| Description | ||||||
The MAX1739/MAX1839 monitor and limit the transformer center-tap voltage when required. This ensures minimal voltage stress on the transformer, which increases the operating life of the transformer and eases its design requirements. These controllers also provide protection against many other fault conditions, including lamp-out and buck short faults. These controllers achieve 50:1 dimming range by simultaneously adjusting lamp current and "chopping" the CCFL on and off using a digitally adjusted pulse-width modulated (DPWM) method. CCFL brightness is controlled by an analog voltage or is set with an SMBus™-compatible two-wire interface (MAX1739). The MAX1739/MAX1839 drive an external high-side N-channel power MOSFET and two low-side N-channel power MOSFETs, all synchronized to the Royer oscillator. An internal 5.3V linear regulator powers the MOSFET drivers and most of the internal circuitry. The MAX1739/MAX1839 are available in space-saving 20-pin QSOP packages and operate over the -40°C to +85°C temperature range. | ||||||
DownloadAn evaluation kit is available: MAX1739EVKIT, MAX1739EVSYS
| Key Features | Applications/Uses | |
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| Key Specifications: CCFL Controllers | |||||||||||||||||||||
| Part Number | Features | VIN (V) |
VIN (V) |
Topology | Channels | Dimming Interface | Freq. | EV Kit | Package/Pins | Smallest Available Pckg. (mm2) |
Oper. Temp. (°C) |
Price | |||||||||
| min | max | max w/pins | See Notes | ||||||||||||||||||
| MAX1739 |
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4.6 | 28 | Royer Oscillator | 1 |
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Resonant | No |
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54.2 | -40 to +85 | - | |||||||||
| MAX1839 |
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| See All CCFL Controllers (17) | |||||||||||||||||||||
| Diagram |
 Functional Diagram |
source：ShenZhen henlito electronic co.,ltd.
web:www.henlito.com
